feat: command to track individual booking usage

backend/gsr_booking/management/commands/individual_usage.py

@@ -0,0 +1,30 @@
+from django.core.management.base import BaseCommand
+from django.utils import timezone
+
+from gsr_booking.models import Group, GSRBooking
+
+
+class Command(BaseCommand):
+    help = "Provides usage stats for a given user."
+
+    def add_arguments(self, parser):
+        parser.add_argument("pennkey", type=str, help="Pennkey of user to check")
+
+    def handle(self, *args, **kwargs):
+        pennkey = kwargs["pennkey"]
+        groups = Group.objects.filter(memberships__user__username=pennkey)
+        bookings = GSRBooking.objects.filter(
+            reservation__creator__username=pennkey,
+            reservation__is_cancelled=False,
+            reservation__end__lte=timezone.now(),
+            is_cancelled=False,
+        )
+
+        for group in groups:
+            print(f'Usage for group "{group.name}":')
+            group_bookings = bookings.filter(reservation__group=group)
+            total_time = sum(
+                (booking.end - booking.start).total_seconds() / 60 for booking in group_bookings
+            )
+            print(f"Total Credits Used: {int(total_time)}")
+            print()